Perforated combustion tube oil burner having atmospheric air draft inducing means



Jan. 17, 1950 F. u. DUMAS 2,494,991

PERFORATED COMBUSTION TUBE OIL BURNER HAVING ATMOSPHERIC AIR DRAFT INDUCING MEANS Filed Dec. 2'7, 1946 A irzumfar: .Efzflcas .Dzzrrzas Patented Jan. 17,1950

PERFORATED COMBUSTION TUBE OIL BURNER HAVING ATMOSPHERIC AIR DRAFT INDUCING MEANS Francois U. Dumas, Spencer, Mass.

Application December 27, 1946, Serial No. 718,822

1 Claim. 1

This invention relates to improvements in oil burners and the principal object of the invention is to provide a novel oil burner having new and improved means for inducing a draft of atmospheric air upwardly into the region of the flame for improved economy in burning fuel.

Other objects and advantages of the invention will appear hereinafter.

Reference is to be had to the accompanying drawings in which Fig. 1 is a vertical section through an oil burner according to the invention; and

Fig. 2 is a section on line 2-2 of Fig. 1.

As shown in the drawings the reference l indicates an oil feed line from a reservoir, this feed line being in the form of a pipe and being secured to a cup-shaped reservoir |2 which it is in communication with. The cup-shaped element |2 is generally circular and extends upwardly as at I4 and flares outwardly as at IS in circular form. The element l2, l4, I6 is provided with an upstanding circular flange |8, the latter extending into a flat horizontal ring-like portion 2|] terminating in a downturned flange 22. The ring-like portion 20 is provided with a series of apertures 24 arranged in circular form, see Fig. 2.

The downturned flange 22 has secured thereto a depending imperforate skirt 26 which is circular and provides a shield completely around the device, this shield, however, being open at the bottom. Flange 22 is also recessed to receive and support in upright condition a perforated cylinder 28 which is also circular and supports a top cover plate or the like 30 as clearly shown in Fig. 1. The top cover or plate 30 is provided with a central opening 32 and surrounding the opening underneath plate 3|] there is located a support 34 carrying a circular plate-like element 36 which also is centrally apertured as at 38.

Plate 36 is connected to three spaced perforated cylinders 40, 4|, and 42, cylinders 40 and 4| being shorter than the cylinder 42 and terminating in ends supported on an element 44 in the form of a circular plate. It is to be noted that all four of the perforated cylinders are concentrically positioned in spaced relation.

The interior circular plate generally indicated at 44 is supported on elements I4 and I6, by leg brackets 46, in spaced relation thereto and forming an oil fuel passage therebetween. Plate 44 is provided with a circular peripheral upstanding flange 46 which curves upwardly and outwardly terminating in a shoulder as shown at 48, supporting cylinders 40 and 4| in spaced relation.

This part of element 44 is provided with a circular series of holes 5|] located interiorly of cylinders 40 and 4|. It is to be noted that the cylinder 42 fits snugly within the upstanding flange 46'.

As the oil in the reservoir member i2 is heated, it will gasify and rise along the passage between members Hi and 44 and continuing upwardly between members I8 and 46 to emerge into the area just under holes 50 where the flame will start. However, it is to be noted that this gas may rise through apertures 50 and between the cylinders 28 and 49. As the gas is thus dispersed, air will be induced from the imperforate skirt 26 through holes 24 and into the same regions described above so that combustion of the gas will be substantially complete and extremely economical and the burner will be maintained in good operating condition with a minimum of cleaning. If desired, a circular wick may be provided in a channel formed between members I8 and 46, as clearly shown in Fig. 1.

Having thus described my invention and the advantages thereof, I do not wish to be limited to the details herein disclosed, otherwise than is set forth in the claim, but what I claim is:

An oil burner comprising a base element of circular form having a series of holes adjacent the periphery thereof, said base element being of depressed cup-shape form, centrally thereof to form a fuel reservoir, an oil feed pipe to the reservoir, a perforated cylinder mounted on the base element at the periphery thereof, said cylinder surrounding the holes, a plate mounted in spaced relation above the base element and forming therewith a fuel passage radially from the reservoir to the edge of the plate, an annular flange about the periphery of the plate extending upwardly and outwardly and located radially inwardly of and adjacent to the said holes, said annular flange having a series of holes located about the periphery thereof, means forming a shoulder on the flange outwardly of the series of holes therein, a second perforated cylinder supported on the shoulder and positioned thereby coaxially with respect to the first cylinder, the

second cylinder having a lesser diameter than the first cylinder so that the two cylinders are spaced, one being within the other, an imperforate skirt depending from the base element at the periphery thereof to create a draft through the holes and between the cylinders when the fuel is under combustion at the edges of the plate, and a third perforated cylinder resting on the plate and located against the flange, the second and third cylinders being spaced and the holes in the flange being located between the second and third cyl- Number inders. 1,660,970 FRANCOIS U. DUMAS. 1,886,667 1,928,201 REFERENCES CITED 5 2 0223 The following references are of record in the 29064381 file of this patent: 2,416,383

UNITED STATES PATENTS Number Name Date 1 Number 625,124 Ruppel May 16, 1899 787,527

Name Date La. Pointe Feb. 28, 1928 Fowler Nov. 8, 1932 Field Sept. 26, 1933 Sherman et a1 Dec. 3, 1935 Quart Dec. 15, 1936 Dumas Feb. 25, 1947 FOREIGN PATENTS Country Date France July 8, 1935 

